#!/usr/bin/env bash
set -e

if [ "$EUID" -ne 0 ]; then
    echo "error: this script must be run as root" >&2
    exit 1
fi

RELEASE="$1"
ARCH=amd64  # TODO: maybe i686 too

case "$RELEASE" in
    trusty) extra_packages=(python-virtualenv postgresql-9.3)
        ;;
    xenial) extra_packages=(virtualenv postgresql-9.5)
        ;;
    *)
        echo "error: unsupported target release: $RELEASE" >&2
        exit 1
        ;;
esac

THIS_DIR="$(dirname "$(readlink -f "$0")")"

set -x

CONTAINER_NAME=zulip-install-$RELEASE-base

if ! lxc-info -n "$CONTAINER_NAME" >/dev/null 2>&1; then
    lxc-create -n "$CONTAINER_NAME" -t download -- -d ubuntu -r "$RELEASE" -a "$ARCH"
fi

lxc-start -n "$CONTAINER_NAME"
"$THIS_DIR"/lxc-wait -n "$CONTAINER_NAME"

run() {
    lxc-attach -n "$CONTAINER_NAME" -- "$@"
}

run passwd -d root

run apt-get update

run apt-get dist-upgrade -y

# As an optimization, we install a bunch of packages the installer
# would install for itself.
run apt-get install -y --no-install-recommends \
  xvfb parallel netcat unzip zip jq python3-pip wget curl eatmydata \
  git crudini openssl ssl-cert \
  build-essential python3-dev \
  closure-compiler memcached rabbitmq-server redis-server \
  hunspell-en-us supervisor libssl-dev yui-compressor puppet \
  gettext libffi-dev libfreetype6-dev zlib1g-dev libjpeg-dev \
  libldap2-dev libmemcached-dev python-dev python-pip \
  python-six libxml2-dev libxslt1-dev libpq-dev \
  "${extra_packages[@]}"

run ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime
run locale-gen en_US.UTF-8 || true
echo "LC_ALL=en_US.UTF-8" | run tee /etc/default/locale

# TODO: on failure, either stop or print message
lxc-stop -n "$CONTAINER_NAME"
